Sandpaper-wheel.



W. G. LIEBIG.

,SANDPAPER WHEEL.

APPLICATION FILED APR. 10,1908.

922,491 Patented May 25, 1909.

WITNESSES I INVENTOR 9 M v Mfume-vs.

UNITED STATES PATENT @FFIQE.

WILLIAM G. LIEBIG, or DETROIT, MI'oI-IIGAN.

SANDPAPER-W'HEEL.

To all whom it may concern:

Be it known that I, WILLIAM G. LIEBIG, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan,

- have invented a certain new and useful Improvement in Sandpaper-Wheels, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to sand paper wheels, and has for its object an improved wheel or drum which permits the quick and firm attachment of a sheet of sand paper thereabout, thus avoiding the use of tacks or glue as a means for attachin its edges more or less insecurely and irregiilarly to the edges of the wheel rim.

In the drawings :Figure 1, is a'perspective of the wheel, with the movable sand paper engaging member in its extreme outer position. Fig. 2, is a cross sectional elevation. Fig. 3, is a perspective of the end of the wheel, with the engaging portions in closed or locked position, as contrasted with the open position shown in Fig. 1.

1 represents the incomplete periphery of a wheel, preferably, though not necessarily, of metal, from whose side walls a segment has been cut. One lateral edge 2 of the portion of the wall that is left has midway between its outer and inner surface a narrow slot 3, substantially parallel therewith, in which one end of a sheet of sand paper 4: is adapted to be inserted. After passing out from there, it passes over on its way to the outer surface of the wheel, the projecting saw teeth or pins 5, which serve to further retard its being pulled out after once being inserted in place. Extending over the peripheral surface of the drum is a cover 6 of felt or other material, over which the sheet of sand paper is drawn until its other end, after having been cut to the right length, is inserted in a narrow groove 7, which extends lengthwise of the carrier bar 8, which is pivoted at 9 in the op posing edge of the metal drum to the edge 2. As shown in Fig. 1, when the insertion of such sheet of sand paper is desired, this carrier bar is thrown, so that the entrance to this slot 7 is almost flush with the peripheral surface of the wheel. As an extra precaution against the slipping of the sand paper Specification of Letters Patent.

Application filed April 10, 1908.

Patented May 25, 1909.

Serial No. 426,409.

sheet from this member, there are provided pins 10 over which its edge is drawn as it emerges from the slot 7. The entire carrier bar 8 is now turned about its point of pivoting by the use of the lever 11, until, as shown in Fig. 2, no part of it projects, or causes the flat cover to project above the line of normal curvature of the wheel as a whole. The lever is then thrown from its position of substantial alinement with the carrier bar, and with the axis of the wheel or drum to the transverse position shown in Fig. 3, and it is forced in so far as to engage with its point 11 against a recessed shoulder or niche in the inner face of the wheel rim. The sand paper which, as stated, has been previously cut off the right length, is thus drawn tightly about the wheel, and the very slight space between the meeting edges (see especially Fig. 2) is of no consequence to the eflicient operation of the device.

While I regard the felt cover 6 as a desirable adjunct, I do not wish to be understood as limiting the scope of my invention to a wheel wherein this is used, as it may be omitted in some instances very advantageously.

What I claim is 1. In a sand aper wheel, in combination with an incomp ete peripheral portion, having one of its edges adapted to clampingly engage the end. of a sheet of sand paper, a member pivoted to the opposite edge of said peripheral portion and to which the other end of such sheet of sand paper is adapted to be attached, and a pivoted lever member whereby said last named member may be swung about its pivot, adapted to be there- .after swung with respect thereto and. to the peripheral portion to a locking position, substantially as described.

2. In a polishing wheel, in combination with a surface portion having an incomplete periphery, means carried on one lateral edge of such incomplete peripheral portion for anchoring one end of a sheet of sand paper with respect thereto, a pivoted member occupying a portion of the space between the opposing edges of said incomplete peripheral portion, adapted to have the opposite end of the sheet of sand paper attached thereto when at the outer limit of its possible swing, and to be thereafter swung to a position of substantial alinement with the adjacent portions of the periphery, and a lever member whereby the same may be actuated and locked in position with res ect to the peripheral member, substantially as described.

3. A sand paper wheel, having in combination a solid peripheral portion whose walls do not form a complete circle, one edge of the cut-away portion being adapted to engage and hold one end of a sheet of sand pa er which it is desired to pass thereabout, a f ler member pivoted at one side to the opposite edge of said cut-away portion, adapted to have the other end of the sheet of sand paper attached to its free edge and to be swung into a position of substantial uniformity of alinement with respect to the adjacent portions of the periphery, and to thereby draw the sand paper tightly about the wheel, and a lever member for actuating the same and for looking the same in position when swung to a position of alinement with the solid peripheral portion, substantially as described.

In testimony whereof, I sign this specification in the presence of two witnesses.

WILLIAM G. LIEBIG.

Witnesses WILLIAM M. SWAN, V. C. SPRATT. 

